Buffalo Bills' Mario Williams, right, speaks as general manager Buddy Nix listens during an NFL football news conference after signing with the team in Orchard Park, N.Y., Thursday, March 15, 2012. Williams signed a contract touted as the richest ever given to an NFL defensive player _ a deal worth up to $100 million with $50 million guaranteed, according to his agent, Ben Dogra. (AP Photo/David Duprey)